Shock absorber



March 25, 1930, G H, E DE RAM 1,752,240

SHOCK ABSORBER Filed Aug 10, 1926 f I 4 k 3 30 323133'36 31 .9

Patented Mar. 25, 1930 GEORGES HENRI ERNEST DE RAM,- OF BO'UIhOGNE-SUR-SEINE, FRANCE SHOCK ABSORBER Application filed August 10, 1926, Serial No. 128,489, and in France August 27, 1925.

The present invention relates to improvements in shock absorbers for motor vehicles and the like, and is characterized by the combination of a friction device and a hydraulic device, so arranged that when combined, efiiciently performs the necessary function.

In the accompanying drawing; Figure 1 is a diagrammatic view of the device showing it in connection with the chasm sis of a vehicle.

Fig. 2 is a longitudinal sectional view taken on a line perpendicular to the pivot.

Fig. 3 is a plan'view partly in section.

Fig. 4 is a sectional view of a modified form.

With reference to Figs. 1, 2 and 3, the aggregate of the apparatus has practically the shape of a pair of. compasses, one of the legs of t e compass constituting a casing 1, while the other leg constitutes the operating lever 3. In Fig. 1 the lever 3 is fixed on the axle by the joint 11 and the casing 1 is fixed. on the chassis at 11, and the suspension comprises a spring attached by one of its ends to the chassis by the links 70.

The device comprises a. member 1, having two perpendicular bores, the first bore receiving the control axle 2 on which is keyed the lever 3 by the member 29 in any desired position. The second .bore is perpendicular to the 30 first mentioned bore and contains the hydraulic members. I

The sleeve may be conical and is clamped by means of a nut at the end of the shaft, and

in which case the lever is split and clam ing 35 is obtained by means of a tangential olt,

which is of well known construction.

The axle 2 is constantly pressed against the joint 4 by an elastic member 27, as clearl shown in Fig. 3. v

A plunger 5 is provided and is equipped with a ball 6 for en agementin the axle 2. This lunger is capa le of sliding in the cylinder and is also ointed in the socket 8. The socket 8 is held by the lunger reservoir 9 45 which is closed bythe p ug-IO carrying the joint eye 11. Tightness at this point is ob tained by the joint 12 and the washers 13 which are retained in place by-the nut 14.

The operation is as follows:

The rotation of the axle in the casing 1 causes a displacement of the plunger 5 in the cylinder 7. The plunger 5 is controlled in turn by the spring 15 and the tickler 16. Owing to this motion the liquid contained in the apparatus flows into the inside of the cylinder throu h the ball valves 18 normally h'eld seated y a leaf spring 19 fixed on the bottom of the cylinder by a screw 20. On the return stroke of the plunger the liquid is forced back by a suitable device (automatic leak such as s own and described in French Patent No. 390,075 dated December 6, 1924).

The liquid obtains access to the valves 18 through grooves provided around the cylinder 7, said grooves also affording communi-. cation between the chambers 22 and 23.

Owing to the construction of the ball 6, the

with a tube 26. The bore of the tube is laced substantially at the center of the cham er 24 so as to insure the supply of liquid in all positions of the apparatus, even if the tank should become half empty. V

The cylinder may be, if desired, fixed and the plunger may be controlled by a connecting rod operated by pushing 01' traction, as indicated in Fig. 4.

. As the apparatus shown is single acting,

it will be noted that by a simple movement of the control lever it can operate indiflz'erently in one direction or the other, or it may also associated with said friction element, a fluid,

operate in both directions.

Referring to Fig. 4, the cylindrical control l 2 comprises two sets of balls and 30',

and 31 and 31 arranged at the ends of the corincting rods 32 and 32, the latter acting alterna ly on the two pistons 33 and 33 which m o e in corresponding cylinders in the body 0 he apparatus. Ball valves 35 and 35, as wel a; pull-off springs 36 and 36 are provided, are automatic leakdevices 37 and 37. A s pply reservoir is provided at 34. The operation is identical with that of Fig. 2, but the device acts in two directions alternately when the cylinder 2 turns in one direction, one of the pistons 33 and 33' acts by hydraulic braking, while the otherpiston is acting when the cylinder 2' turns in the other direction.

I claim:

1. A shock absorber comprising two pivotally connected members, a hydraulic element and a friction element carried by one of said members, the other member constituting the operating lever and associated with said friction element, means for supplying said hydraulic member with a fluid upon the rota-' tion of said friction element, whereb the action of said friction element and sai operat ing lever is automatically controlled.

2. A shock absorber com rising two pivotally connected members, a ydraulic element and a friction element carried by one of said members, the other'member constituting the operating lever and associated with said friction element, a fluid reservoir in said member carryinv said hydraulic element, an eye joint plug disposed in said reservoir, means for automatically supplying said hydraulic element with fluid upon the rotation of said friction element in one direction from its normal position, and means for automatically returnin said fluid to said reservoir on the return 0 said friction element to its normal position.

3. A shock absorber comprising two pivotally connected members, a hydraulic element and a friction element carried by one of said members, the other member constitutin the operating lever and associated with sai friction element, a fluid reservoir in said member carrying said hydraulic element, means for automatically supplying said hydraulic element with fluid upon the rotation of said friction element, in one direction from its normal position and means for automatically returning said fluid to said res ervoir on the return of said friction element to its normal position.

reservoir associated with said member carrying said hydraulic element, an eye joint plug disposed in said fluid reservoir, meansfor automatically supplying said hydraulic element with fluid upon the rotation of said friction element in one direction from its normal position, and means for automatically returning said fluid to said reservoir on the return of said friction element to its normal position.

In testimony whereof I aflix my si ature.

GEORGES HENRI ERNEST do RAM.

4. A shock absorber comprising two pivotally connected members, a hydraulic element and a friction element carried by one of said members, the other member constitutin the operating lever and associated with sai friction element, resilient tightening means 

